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Error Concealment Method for MPEG-4 Video in Wireless Environment  

Park, Sun-Young (Dept. of Information and Communications Engineering, Sejong University)
Song, Joon-Ho (Varo Vision Co., Ltd.)
Moon, Joo-Hee (Dept. of Information and Communications Engineering, Sejong University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.39, no.6, 2002 , pp. 641-651 More about this Journal
Abstract
Recently, many advanced video application services over the mobile wireless networks have required a transcoder which can efficiently reduce the size of compressed video bitstreams. The transcoder can be worked in either the spatial domain or the DCT domain. In this paper, we propose a new fast hybrid-type transcoder which can efficiently reduce the frame size with keeping the visual quality. The proposed scheme consists of two major processes: a transform domain process and a spatial domain process. We also propose a scheme for coding mode selection and motion vector refinement. Experimental results show that our approach can reduce the computational complexity more than any other conventional spatial-domain transcoder with keeping the visual quality.
Keywords
video; MPEG-4; error concealment; video packet; mobile;
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